2015 Countdown Problem #2: 1 Jan 2115

You are given the following information:

  1. Christmas Day in 2014 (25 December 2014) falls on a Thursday.
  2. There are 7 days in a week, and 365 days in a year except for leap years (where there are 366 days).
  3. A year is a leap year if:
  • it is divisible by 4 and not divisible by 100, or;
  • it is divisible by 400.

What day is New Year’s Day in 2115 (1 January 2115)?

Please answer:

  • 1 for Monday
  • 2 for Tuesday
  • 3 for Wednesday
  • 4 for Thursday
  • 5 for Friday
  • 6 for Saturday
  • 7 for Sunday

This problem is part of the set 2015 Countdown Problems.

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